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Posted by bill on 07/13/07 19:47
Michael Fesser wrote:
> .oO(bill)
>
>> I am trying to write clean code but keep having trouble deciding
>> when to quote an array index and when not to.
>
> Literal array indexs always have to be quoted, unless the entire array
> is embedded in double-quoted string without using curly syntax:
>
> print $foo['bar'];
>
> print "hello $foo[bar]";
>
> print "hello {$foo['bar']}";
>
> All correct.
>
>> sometimes when I quote an array index inside of double quotes I
>> get an error about enased whitespace (to my best memory)
>>
>> AT other times I get an undefined index notice as below:
>>
>> Notice: Undefined index: last_reminder_id in...
>>
>> the 2nd line (which wraps to the 3rd in this posting
>> is the one listed in the error message:
>>
>> $sql = "SELECT * from notes
>> where recall_date > '0' and recall_date <= '$now' and id >
>> '$_SESSION[last_reminder_id]'";
>
> Syntax is correct. I'm just wondering why the values for the ID and date
> fields are quoted. If a value is numeric, don't quote it. So the parser
> might be right and the index is just not defined?
I hate that: The index *is* undefined the first time through !
I sure do appreciate the other pointers and will study them.
>
>> what is the correct syntax and/or can anyone point me at a
>> reference that will explain this ?
>
> All possible syntax variants are explained in the manual (see the
> examples).
>
> Array do's and don'ts
> http://www.php.net/manual/en/language.types.array.php#language.types.array.donts
>
> Micha
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